The Supreme Court decision record for Scott v. Harris includes a video (93 MB RealMedia format download). That video is available here:
This video is the Supreme Court decision record video, converted to more accessible formats.
The copyright status of this video is not fully clear. It may be in the public domain, because it is included in the Court's decision record. In any case, fair use, which is unfortunately is a complicated issue, is as always, legal use.
For discussion of this video, see http://purplemotes.net/2008/02/10/editing